--- version: rssac002v3 service: i.root-servers.net start-period: '2019-01-17T00:00:00Z' metric: traffic-volume dns-udp-queries-received-ipv4: 6610513154 dns-udp-queries-received-ipv6: 1200614766 dns-tcp-queries-received-ipv4: 147581056 dns-tcp-queries-received-ipv6: 36357952 dns-udp-responses-sent-ipv4: 6518360527 dns-udp-responses-sent-ipv6: 1190121468 dns-tcp-responses-sent-ipv4: 140797216 dns-tcp-responses-sent-ipv6: 34022207